Abstract: A device is provided that has a bus including a first line and a second line. A first set of devices are coupled to the bus and, in a first mode of operation, configured to use the first line for data transmissions and use the second line for a first clock signal. One or more additional lines are connected between two or more of the devices in the first set of devices for transmitting signaling between the two or more devices. A second set of devices are configured to use the bus and at least one of the additional lines for data transmissions in a second mode of operation, where in the second mode of operation symbols are encoded across the first line, the second line, and the at least one of the additional lines.

Abstract: Systems, methods and apparatus are described that offer improved performance of a sensor bus. A first command is transmitted to devices coupled to a serial bus operated in a first mode in accordance with a first protocol to cause the serial bus to be operated in a second mode. After communicating in accordance with a second protocol while the serial bus is operated in the second mode, a second command is transmitted to the plurality of devices in accordance with the first protocol to terminate the second mode. In the second mode, extra symbols inserted into a sequence of symbols transmitted on the serial bus prevent the occurrence of an unintended signaling state on the serial bus. Pulses transmitted on a wire of the serial bus in the second mode may have their duration limited such that a filter of a second device suppresses the limited-duration pulses.

Abstract: Embodiments of the invention provide for a sensor system with enhanced low-power features. Embodiments can include transmission of sensor data from a transmitter unit to a receiver unit. The sensor data can flag the sensor data with a particular header ID, enabling the receiver unit to route the sensor data to a low-power processing unit within the receiver unit without using the receiver unit's higher-power application processer. Embodiments can also utilize a proprietary encryption engine to provide a supplementary encryption layer to any encryption utilized in the wireless protocol. The transmitter unit can also compress and batch the sensor data for sending, to further increase power savings.

Abstract: Aspects of the invention are related to a method for synchronizing a first sensor clock of a first sensor. The exemplary method comprises: correcting the first sensor clock for a first time, transferring data from the first sensor, and correcting the first sensor clock for a second time, wherein a time interval between two corrections of the first sensor clock is selected such that the first sensor clock is sufficiently aligned with a processor clock of a processor over the time interval.

Abstract: A system including a selection module to select one of a plurality of templates corresponding to a plurality of light emitting diodes, where the selected template includes one or more of temperature, current, and voltage characteristics of the plurality of light emitting diodes. A control module measures a voltage across one of the plurality of light emitting diodes; determines a temperature of the plurality of light emitting diodes based on the voltage measured across the one of the plurality of light emitting diodes and the selected template; and in order to maintain a luminosity of the plurality of light emitting diodes at a predetermined luminosity, adjusts current through the plurality of light emitting diodes based on the temperature, the selected template, and calibration data. The calibration data include current through the plurality of light emitting diodes and corresponding luminosities of the plurality of light emitting diodes.

Abstract: A system includes, in at least one aspect, a first circuit configured to be coupled to a load, and a second circuit configured to perform operations including receiving a digital voltage signal representing a voltage supplied to a first circuit, identifying a first time stamp associated with a voltage value representing an extrema in the digital voltage signal, receiving a digital current signal representing a current drawn by the load in response to the supplied voltage, identifying a second time stamp associated with the digital current signal, the second time stamp being within a threshold time of the first time stamp, and identifying a current value associated with the second time stamp as the current drawn by the load.

Abstract: A system including a switch and a control circuit. The switch is configured to receive a first voltage. The control circuit is configured to, during a rising portion of a half cycle of the first voltage, (i) turn on the switch in response to the first voltage reaching a first value, and (ii) turn off the switch in response to the first voltage reaching a second value, where the second value is greater than the first value. The control circuit is further configured to, during a falling portion of the half cycle of the first voltage, (i) turn on the switch in response to the first voltage reaching the second value, and (ii) turn off the switch in response to the first voltage reaching the first value.

Abstract: In one embodiment, an apparatus includes circuitry configured to receive a dimming input to control a dimming level of a lamp. Also, the apparatus includes circuitry configured to generate a control signal based on the dimming input. The control signal indicates the dimming level for a converter of the lamp and the converter is configured to interpret the control signal to control to the dimming level of the lamp using a sinusoidal signal.

Abstract: A system including a power transistor configured to receive an alternating current (AC) line voltage and a control circuit. During a rising portion of a half cycle of the AC line voltage, the control circuit is configured to turn on the power transistor when the AC line voltage reaches a first value and turn off the power transistor when the AC line voltage reaches a second value. The second value is greater than the first value. During a falling portion of the half cycle, the control circuit is configured to turn on the power transistor when the AC line voltage reaches the second value and turn off the power transistor when the AC line voltage reaches the first value.

Abstract: A system includes, in at least one aspect, a first circuit configured to be coupled to a load, and a second circuit configured to perform operations including receiving a digital voltage signal representing a voltage supplied to a first circuit, identifying a first time stamp associated with a voltage value representing an extrema in the digital voltage signal, receiving a digital current signal representing a current drawn by the load in response to the supplied voltage, identifying a second time stamp associated with the digital current signal, the second time stamp being within a threshold time of the first time stamp, and identifying a current value associated with the second time stamp as the current drawn by the load.

Abstract: A system including a selection module to select one of a plurality of templates corresponding to a plurality of light emitting diodes, where the selected template includes one or more of temperature, current, and voltage characteristics of the plurality of light emitting diodes. A control module measures a voltage across one of the plurality of light emitting diodes; determines a temperature of the plurality of light emitting diodes based on the voltage measured across the one of the plurality of light emitting diodes and the selected template; and in order to maintain a luminosity of the plurality of light emitting diodes at a predetermined luminosity, adjusts current through the plurality of light emitting diodes based on the temperature, the selected template, and calibration data. The calibration data include current through the plurality of light emitting diodes and corresponding luminosities of the plurality of light emitting diodes.

Abstract: A process for controlling a current supplied to a load includes, in at least one aspect, detecting input to control a current supplied to a load operated by a driving signal, and in response to detecting the input, modifying the driving signal to control the current supplied to the load, wherein modifying the driving signal comprises alternately applying a first duty cycle and a second duty cycle to the driving signal.

Abstract: A method includes, in at least one aspect, receiving a digital voltage signal representing a voltage supplied to a circuit having a load, identifying a first time stamp associated with a voltage value representing an extrema in the digital voltage signal, receiving a digital current signal representing a current drawn by the load in response to the supplied voltage, identifying a second time stamp associated with the digital current signal, the second time stamp being within a threshold time of the first time stamp, and identifying a current value associated with the second time stamp as the current drawn by the load.

Abstract: A system including a calibration module, a selection module, and a control module. The calibration module is configured to generate calibration data for a plurality of light emitting diodes (LEDs). The calibration data include current through the LEDs and corresponding luminosities of the LEDs. The selection module is configured to select one of a plurality of templates corresponding to the LEDs. The selected template includes at least one of temperature, current, and voltage characteristics of the LEDs. The control module is configured to determine a temperature of the LEDs and adjust current through the LEDs based on the temperature, the selected template, and the calibration data to maintain a luminosity of the LEDs at a predetermined luminosity.

Abstract: A system including a power transistor configured to receive an alternating current (AC) line voltage and a control circuit. During a rising portion of a half cycle of the AC line voltage, the control circuit is configured to turn on the power transistor when the AC line voltage reaches a first value and turn off the power transistor when the AC line voltage reaches a second value. The second value is greater than the first value. During a falling portion of the half cycle, the control circuit is configured to turn on the power transistor when the AC line voltage reaches the second value and turn off the power transistor when the AC line voltage reaches the first value.

Abstract: A process for controlling a brightness of a lamp includes, in at least one aspect, detecting input to control a brightness of a fluorescent lamp operated by a driving signal, and in response to detecting the input, modifying the driving signal to control the brightness of the fluorescent lamp, wherein modifying the driving signal comprises alternately applying a first duty cycle and a second duty cycle to the driving signal, wherein the first duty cycle and the second duty cycle are substantially complementary to each other.

Abstract: Systems and techniques to control of delivery of current through one or more lamps include, in at least one aspect, a method comprising: receiving an electric signal from a resistor in a circuit, where the resistor is selected based on a lamp; determining that a value associated with the electric signal falls in a preset range of values, the preset range having one or more parameters that correspond to the lamp; and outputting the one or more parameters to operate the lamp.

Abstract: Systems and techniques for identifying that a load associated with a lamp is absent from a circuit is described. A method, for example, includes receiving output of a circuit having at least two loads associated with a lamp and an anti-parallel transformer, monitoring, based on the output, a resistance of the anti-parallel transformer with respect to a threshold corresponding to the associated loads, and identifying that either the first of the associated loads or the second of the associated loads is absent from the circuit responsive to the monitored resistance crossing the threshold.

Abstract: Methods to identify a fluorescent lamp among multiple fluorescent lamps include: receiving input to a circuit including multiple fluorescent lamps operated by corresponding multiple control signals, each fluorescent lamp configured to output radio frequency (RF) signals in response to receiving a detection signal, the input to identify which first control signal is provided to a first fluorescent lamp; in response to receiving the input, providing a first discovery signal in place of each control signal provided to each fluorescent lamp, one fluorescent lamp at a time; determining that the first fluorescent lamp outputs RF signals; and identifying the control signal that was replaced with the detection signal that caused the first fluorescent lamp to output the RF signals.

Abstract: Method to identify a current drawn by a fluorescent lamp in a circuit. Methods include receiving a voltage supplied to a fluorescent lamp drawing a current in response to the voltage, digitally sampling the voltage at a sampling frequency and associating a first time stamp with a voltage value representing one of a maximum or minimum value in observed voltage, receiving the current after receiving the voltage, digitally sampling the current at the sampling frequency and associating multiple second time stamps with a corresponding multiple current values, identifying a second time stamp, a difference between the first time stamp and the second time stamp being within a threshold, and identifying a current value associated with the second time stamp as the current drawn by the fluorescent lamp.